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view test/compiler/8010927/Test8010927.java @ 15724:a9f969e65b61
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author | Gilles Duboscq <duboscq@ssw.jku.at> |
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date | Sat, 17 May 2014 11:41:35 +0200 |
parents | 3f281b313240 |
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/* * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ /* * @test * @bug 8010927 * @summary Kitchensink crashed with SIGSEGV, Problematic frame: v ~StubRoutines::checkcast_arraycopy * @library /testlibrary/whitebox /testlibrary * @build Test8010927 * @run main ClassFileInstaller sun.hotspot.WhiteBox * @run main/othervm -XX:+UnlockDiagnosticVMOptions -XX:+IgnoreUnrecognizedVMOptions -XX:+WhiteBoxAPI -Xbootclasspath/a:. -Xmx64m -XX:NewSize=20971520 -XX:MaxNewSize=32m -XX:-UseTLAB -XX:-UseParNewGC -XX:-UseAdaptiveSizePolicy Test8010927 */ import sun.hotspot.WhiteBox; import java.lang.reflect.Field; import sun.misc.Unsafe; /** * The test creates uncommitted space between oldgen and young gen * by specifying MaxNewSize bigger than NewSize. * NewSize = 20971520 = (512*4K) * 10 for 4k pages * Then it tries to execute arraycopy() with elements type check * to the array at the end of survive space near unused space. */ public class Test8010927 { private static final Unsafe U; static { try { Field unsafe = Unsafe.class.getDeclaredField("theUnsafe"); unsafe.setAccessible(true); U = (Unsafe) unsafe.get(null); } catch (Exception e) { throw new Error(e); } } public static Object[] o; public static final boolean debug = Boolean.getBoolean("debug"); // 2 different obect arrays but same element types static Test8010927[] masterA; static Object[] masterB; static final Test8010927 elem = new Test8010927(); static final WhiteBox wb = WhiteBox.getWhiteBox(); static final int obj_header_size = U.ARRAY_OBJECT_BASE_OFFSET; static final int heap_oop_size = wb.getHeapOopSize(); static final int card_size = 512; static final int one_card = (card_size - obj_header_size)/heap_oop_size; static final int surv_size = 2112 * 1024; // The size is big to not fit into survive space. static final Object[] cache = new Object[(surv_size / card_size)]; public static void main(String[] args) { masterA = new Test8010927[one_card]; masterB = new Object[one_card]; for (int i = 0; i < one_card; ++i) { masterA[i] = elem; masterB[i] = elem; } // Move cache[] to the old gen. long low_limit = wb.getObjectAddress(cache); System.gc(); // Move 'cache' to oldgen. long upper_limit = wb.getObjectAddress(cache); if ((low_limit - upper_limit) > 0) { // substaction works with unsigned values // OldGen is placed before youngger for ParallelOldGC. upper_limit = low_limit + 21000000l; // +20971520 } // Each A[one_card] size is 512 bytes, // it will take about 40000 allocations to trigger GC. // cache[] has 8192 elements so GC should happen // each 5th iteration. for(long l = 0; l < 20; l++) { fill_heap(); if (debug) { System.out.println("test oop_disjoint_arraycopy"); } testA_arraycopy(); if (debug) { System.out.println("test checkcast_arraycopy"); } testB_arraycopy(); // Execute arraycopy to the topmost array in young gen if (debug) { int top_index = get_top_address(low_limit, upper_limit); if (top_index >= 0) { long addr = wb.getObjectAddress(cache[top_index]); System.out.println("top_addr: 0x" + Long.toHexString(addr) + ", 0x" + Long.toHexString(addr + 512)); } } } } static void fill_heap() { for (int i = 0; i < cache.length; ++i) { o = new Test8010927[one_card]; System.arraycopy(masterA, 0, o, 0, masterA.length); cache[i] = o; } for (long j = 0; j < 256; ++j) { o = new Long[10000]; // to trigger GC } } static void testA_arraycopy() { for (int i = 0; i < cache.length; ++i) { System.arraycopy(masterA, 0, cache[i], 0, masterA.length); } } static void testB_arraycopy() { for (int i = 0; i < cache.length; ++i) { System.arraycopy(masterB, 0, cache[i], 0, masterB.length); } } static int get_top_address(long min, long max) { int index = -1; long addr = min; for (int i = 0; i < cache.length; ++i) { long test = wb.getObjectAddress(cache[i]); if (((test - addr) > 0) && ((max - test) > 0)) { // substaction works with unsigned values addr = test; index = i; } } return index; } }